Downlink control information receiving method and apparatus, and storage medium

Abstract

A method for receiving downlink control information (DCI) includes: receiving bandwidth part (BWP) configuration information transmitted by an access network device, the BWP configuration information configuring a target BWP located in an unlicensed spectrum and comprises m sub-bands, m being a positive integer greater than 1; determining the m sub-bands of the target BWP according to the BWP configuration information; monitoring a target sequence on the m sub-bands respectively; and monitoring DCI on all or part of the m sub-bands after the target sequence is detected.

The invention claimed is: 
     
       1. A method for receiving downlink control information (DCI), the method being performed by a terminal and comprising:
 receiving bandwidth part (BWP) configuration information transmitted by an access network device, the BWP configuration information configuring a target BWP located in an unlicensed spectrum and comprises m sub-bands, m being a positive integer greater than 1; 
 determining the m sub-bands of the target BWP according to the BWP configuration information; 
 monitoring a target sequence at a first time domain position on all or part of the m sub-bands respectively, wherein the first time domain position is one of a time-frequency position pre-determined by a communication protocol, or a time domain position pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is configured to identify sub-bands on which Listen Before Talk (LBT) is successful in the m sub-bands, or to identify sub-bands on which the DCI is transmitted in the m sub-bands; and 
 monitoring DCI on all or part of the m sub-bands after the target sequence is detected. 
 
     
     
       2. The method of  claim 1 , wherein monitoring the DCI on all or part of the m sub-bands comprises:
 monitoring the DCI on each of the m sub-bands. 
 
     
     
       3. The method of  claim 1 , wherein monitoring the DCI on all or part of the m sub-bands comprises:
 determining n target sub-bands on which the target sequence is detected, n being a positive integer not greater than m; and 
 monitoring the DCI on at least one of the n target sub-bands; 
 wherein the target sequence is transmitted by the access network device on the target sub-bands when the LBT is successful, or on a target sub-band transmitting the DCI. 
 
     
     
       4. The method of  claim 3 , further comprising:
 receiving a control resource set for the m sub-bands from the access network device; 
 wherein monitoring the DCI on at least one of the n target sub-bands comprises:
 determining physical downlink control channel (PDCCH) search positions on the n target sub-bands according to the control resource set for the m sub-bands, the PDCCH search positions on the n target sub-bands having different frequency domain positions and same time domain position; and 
 monitoring the DCI at the PDCCH search positions. 
 
 
     
     
       5. The method of  claim 1 , wherein the BWP configuration information is semi-static configuration information. 
     
     
       6. The method of  claim 1 , wherein the m sub-bands are consecutive in a frequency domain. 
     
     
       7. A method for transmitting downlink control information (DCI), the method being performed by an access network device and comprising:
 transmitting bandwidth part (BWP) configuration information to a terminal, the BWP configuration information configuring a target BWP located in an unlicensed spectrum and comprises m sub-bands, m being a positive integer greater than 1; 
 performing Listen Before Talk (LBT) on the m sub-bands, and determining n target sub-bands according to a LBT result, n being a positive integer not greater than m; 
 transmitting a target sequence at a first time domain position on the n target sub-bands respectively, wherein the first time domain position is one of a time-frequency position pre-determined by a communication protocol, or a time domain position pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is configured to identify sub-bands on which the LBT is successful in the m sub-bands, or to identify sub-bands on which the DCI is transmitted in the m sub-bands; and 
 transmitting DCI to the terminal on all or part of the m sub-bands. 
 
     
     
       8. The method of  claim 7 , wherein determining the n target sub-bands according to the LBT result further comprises:
 determining n sub-bands on which the LBT is successful as the n target sub-bands. 
 
     
     
       9. The method of  claim 7 , wherein determining n target sub-bands according to a LBT result further comprises:
 determining k sub-bands on which the LBT is successful, k being a positive integer not greater than m; and 
 determining the n target sub-bands for transmitting the DCI from the k sub-bands. 
 
     
     
       10. The method of  claim 8 , wherein transmitting the DCI to the terminal on all or part of the m sub-bands comprises:
 transmitting the DCI to the terminal on each of the m sub-bands. 
 
     
     
       11. The method of  claim 8 , wherein transmitting the DCI to the terminal on all or part of the m sub-bands comprises:
 transmitting the DCI to the terminal on all or part of the n target sub-bands. 
 
     
     
       12. The method of  claim 9 , wherein transmitting the DCI to the terminal on all or part of the m sub-bands comprises:
 transmitting the DCI to the terminal on each of the n target sub-bands, the DCI being configured to schedule a time-frequency resource on the k sub-bands. 
 
     
     
       13. The method of  claim 7 , further comprising:
 transmitting a control resource set for the m sub-bands to the terminal. 
 
     
     
       14. The method of  claim 7 , wherein the m sub-bands are consecutive in a frequency domain. 
     
     
       15. An access network device, comprising:
 a processor; and 
 a memory for storing instructions executable by the processor; 
 wherein the processor is configured to perform the method for transmitting the DCI of  claim 7 . 
 
     
     
       16. A terminal, comprising:
 a processor; and 
 a memory for storing instructions executable by the processor; 
 wherein the processor is configured to: 
 receive bandwidth part (BWP) configuration information transmitted by an access network device, the BWP configuration information configuring a target BWP located in an unlicensed spectrum and comprises m sub-bands, m being a positive integer greater than 1; 
 determine the m sub-bands of the target BWP according to the BWP configuration information; 
 monitor a target sequence at a first time domain position on all or part of the m sub-bands respectively, wherein the first time domain position is one of a time-frequency position pre-determined by a communication protocol, or a time domain position pre-configured by the access network device during a procedure of configuring the target BWP; and the target sequence is configured to identify sub-bands on which Listen Before Talk (LBT) is successful in the m sub-bands, or to identify sub-bands on which the DCI is transmitted in the m sub-bands; and 
 monitor DCI on all or part of the m sub-bands after the target sequence is detected.